# Copyright 2016 Google Inc. All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Demonstrates how to authenticate to Google Cloud Platform APIs using

the Google API Client."""

import argparse

def implicit(project):

import googleapiclient.discovery

# If you don't specify credentials when constructing the client, the

# client library will look for credentials in the environment.

storage_client = googleapiclient.discovery.build('storage', 'v1')

# Make an authenticated API request

buckets = storage_client.buckets().list(project=project).execute()

print(buckets)

def explicit(project):

from google.oauth2 import service_account

import googleapiclient.discovery

# Construct service account credentials using the service account key

# file.

credentials = service_account.Credentials.from_service_account_file(

'service_account.json')

# Explicitly pass the credentials to the client library.

storage_client = googleapiclient.discovery.build(

'storage', 'v1', credentials=credentials)

# Make an authenticated API request

buckets = storage_client.buckets().list(project=project).execute()

print(buckets)

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter)

parser.add_argument('project')

subparsers = parser.add_subparsers(dest='command')

subparsers.add_parser('implicit', help=implicit.__doc__)

subparsers.add_parser('explicit', help=explicit.__doc__)

args = parser.parse_args()

if args.command == 'implicit':

implicit(args.project)

elif args.command == 'explicit':

explicit(args.project)